1936. In villages, towns and cities across Scotland, 549 lives are gradually intertwining.

2017. The country is divided. Four millennials are told a story.

549: Scots of the Spanish Civil War is the true story of four miners who, 80 years ago, travelled from the streets of Prestonpans to the valleys of Spain to join the International Brigade. They gave up everything that was familiar: for a land that was not; for a people they had never met; and for a cause they believed was right.